How does an antenna produce radio waves?

A space probe 2.0 * 1010 m from a star measures the total intensity of electromagnetic radiation from the star to be 5.0 * 103 W>m2. If the star radiates uniformly in all directions, what is its total average power output

The name of energy that comes from the sun is called?

There are 1,000,000 grains of sand in a heap. If we remove one grain, it is still a heap. If we remove another grain, if it still a heap.

Describe at least three careers in environmental science

A ball sitting at the top of an incline has A no energy B kinetic C potential energy D moving energy

Which of the following describes temperature

Which of the following items are affected the most by the force of gravity? A. A tennis ball B. A golf ball C. A baseball D. A bowling ball

Cooling down after a workout allows the oxygen to continuing moving through the body and keeps the muscles from tightening up to fast

The force that slows down and eventually stops a ball you roll across the pavement is called

The force of friction on an object is dependent on two things. what are they?